160531631 has 4 divisors (see below), whose sum is σ = 172880232. Its totient is φ = 148183032.

The previous prime is 160531621. The next prime is 160531633. The reversal of 160531631 is 136135061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136135061 = 10151 ⋅13411.

It is a cyclic number.

It is not a de Polignac number, because 160531631 - 2²⁶ = 93422767 is a prime.

It is a super-2 number, since 2×160531631² = 51540809103040322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 160531631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160531633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6174281 + ... + 6174306.

It is an arithmetic number, because the mean of its divisors is an integer number (43220058).

Almost surely, 2^160531631 is an apocalyptic number.

160531631 is a deficient number, since it is larger than the sum of its proper divisors (12348601).

160531631 is a wasteful number, since it uses less digits than its factorization.

160531631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12348600.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 160531631 is about 12670.1077738116. The cubic root of 160531631 is about 543.4841371540.

Adding to 160531631 its reverse (136135061), we get a palindrome (296666692).

The spelling of 160531631 in words is "one hundred sixty million, five hundred thirty-one thousand, six hundred thirty-one".